$ git clone -n https://src.fedoraproject.org/rpms/kBuild.git /var/lib/mock/f31-build-90341-32204/root/chroot_tmpdir/scmroot/kBuild
Cloning into '/var/lib/mock/f31-build-90341-32204/root/chroot_tmpdir/scmroot/kBuild'...
$ git reset --hard 087891c07d1ba760e40466c307aec692369b59bd
HEAD is now at 087891c - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild